pxdig,
To my knowledge Skuzzy has never advocated or agreed to purge orphaned skins. Its been suggested more than once, but all I've seen him say on the subject when asked directly is that he doesn't like to think about it; it gives him a headache. To the contrary, I've seen him state he is against replacing skins because some squads may prefer a particular skin and if it is removed they get upset.
Also, if and when the 3D model of the P-51 is revamped, I will have nothing to submit - the texture map will surely change and no one's existing skins will be compatible - everyone will have to start over. That is the nature of a 3D model change.